One tip when booting from a WinXP CD with the intention to install from it, is to ensure you have all disk partitions deleted and THEN select the unallocated disk as the place upon which to install WindowsXP. It will then format it and start the install.
Any attempt at creating partitions prior to this usually leaves the uninitiated with a PC that has a bizarre bunch of disks and partitions.
A second tip is to thoroughly set the Regional & Language Settings to ensure you remove the US English and set it to UK English in all 4 places this is required on the 3-tabbed dialog box.
HTH.
Mike.